You can customize the notifications such as notification repeat times, alarm tone, vibrate duration, LED flashing color, speed and screen flashing and more. It also has an option to launch dialler app on clicking notification.

Also it uses low battery use, low memory use and advanced power saving design. It also has the option to “Manual voicemail check” option, to restart the service every X minutes, thus forcing a manual voicemail check. This may fix issues on some phones where the service stops running or halts after some time.